I want to use a mecanum drive this year but I don’t have much experience in building an effective one. I am using a 4-motor drive and don’t know what gear ratio to use. What should I do?
Dont gear mecs. It’ll lead to drastic inconsistencies between the wheels due to slop.
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So it’s better to have a direct drive.
Generally for mec or x drives you want the wheels directly driven, yes
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What you really want to figure out is what size wheel and what rpm cartridge you’ll be using. Diameter of the wheel changes the MA just as much as a gear ratio
I was thinking about using the 4" wheels for now, but am open to change if I need to
4" is the only option for mecanums. there are, however, 3.25" and 2.75" options for omniwheels
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People have made custom diameter wheels (including mec wheels) in the past but id still recommend regular vex wheels or an x drive any day
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I’d like to see a picture or video where someone did this with competition legal parts and if it worked well and consistently.
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damn. How wide are they (I assume 2 holes)
looks like 3 holes probably
high strength gears are 1 hole and if it was 3 holes it wouldn’t be much better so thats why I think 2 ish holes
Yeah, they look about 2 holes wide.
they’re like 2.5 holes but you’d have to make a 3 hole gap to fit screw heads, and because the gears aren’t quite touching.
jeez now I have to make custom gussets for custom angle x-drive and custom mecanum wheels in cad.
makes sense but is a 3 hole wide base possible, if so then that would be great
I would like to make it clear to anyone reading:
It is not viable to make your own mecanums.
Real ones exist now.
Just don’t.
??? its not 2011
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but we are all obsessed with making a skinnier base for the agility of it and imagine flexing on other teams and judges with it